I could have better stated that by saying “such a church is not acting according to its confession of faith.” I’m not saying a zero to sixty in 2.5 seconds thing is the answer. Instruction is good and proper, and until such a time parents are not on board, they should not be members, because it’s “great sin” to withhold one’s children from baptism, and the church would be complicit in such. There are other problems, too, but that’s the first consideration.
(Also, to be clear, I am not arguing for church membership having fully to subscribe to the Confession of faith, but rather submission to government as guided by said Confession, and vows not to grate against such teachings)